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Probability of detection for eddy current pulsed thermography of angular defect quantification

Lookup NU author(s): Junzhen Zhu, Dr Jianbo Wu, Professor Gui Yun TianORCiD

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Abstract

IEEE Eddy current pulsed thermography (ECPT) as one of the emerging NDT&E nondestructive testing and evaluation techniques has been used for the evaluation of the integrity of rail tracks, especially for rolling contact fatigue (RCF) detection and crack sizing. This paper proposes a probability of detection (POD) analysis framework for the ECPT system. Specifically, three different features, i.e. max thermal response, first-order different imaging and its ratio mapping, were used to quantify the length of the angular slot by linear fitting. Based on the fitting relation between these features and the slot length, POD curves for linear-coil based ECPT system of angular defect detection were calculated and compared. Results show that max thermal response feature has the highest repeatability and detectability for shorter slot detection. First-order different imaging and ratio mapping features are more convincing for longer slot detection.

Publication metadata

Author(s): Zhu J, Min Q, Wu J, Tian GY

Publication type: Article

Publication status: Published

Journal: IEEE Transactions on Industrial Informatics

Year: 2018

Volume: 14

Issue: 12

Pages: 5658-5666

Print publication date: 01/12/2018

Online publication date: 21/08/2018

Acceptance date: 02/04/2018

ISSN (print): 1551-3203

ISSN (electronic): 1941-0050

Publisher: IEEE

URL: https://doi.org/10.1109/TII.2018.2866443

DOI: 10.1109/TII.2018.2866443

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